Convert the following to engineering notation

$($

a quantity represented by a number between

$1$

$-$

$9$

$9$

$9$

$$and a power of

$1$

$0$

$$that is divisible by

$3$

$$:

$($

a

$)$

$1$

$8$

$,$

$0$

$0$

$0$

$$

$($

b

$)$

$1$

$2$

$1$

$2$

$$

$$

$($

c

$)$

$1$

$0$

$-$

$5$

$$second